Blood sampling instrument



FIG. 1 is a right-side elevational view of a blood sampling instrument showing our new design;

FIG. 2 is a left-side elevational view of FIG. 1;

FIG. 3 is a top elevational view of FIG. 1;

FIG. 4 is a bottom elevational view of FIG. 1; and,

FIG. 5 is a top perspective view of FIG. 1. 

The ornamental design for a blood sampling instrument, as shown and described. 